文献类型：期刊文献

中文题名：利用叶绿素a浓度反演精细提取红树植物生长区域

英文题名：Growth Regions of Mangrove Plants Fine Extraction from Chlorophyll a Concentration Retrieval

作者：韩泽文[1,3];李卓[1,4];孙琰[1];刘大召[1,2]

机构：[1]广东海洋大学电子与信息工程学院,广东湛江524088;[2]南方海洋科学与工程广东省实验室(湛江)南海资源大数据中心,广东湛江524000;[3]中海油信息科技有限公司天津分公司,天津300450;[4]湛江市林业科学研究所,广东湛江524037

年份：2022

卷号：47

期号：7

起止页码：1103

中文期刊名：武汉大学学报（信息科学版）

外文期刊名：Geomatics and Information Science of Wuhan University

收录：CSTPCD、、CSCD2021_2022、EI(收录号：20223812774242)、Scopus、北大核心、CSCD、北大核心2020

基金：南方海洋科学与工程广东省实验室(湛江)资助(ZJW?2019?08);国家自然科学基金(41906021);广东省科技计划(2016A020222016);广东海洋大学创新强校项目(Q16147);广东海洋大学项目(C17077)。

语种：中文

中文关键词：GF?1;红树植物分布提取;叶绿素a反演;通明海湾

外文关键词：GF?1;mangrove plants distribution extraction;Chlorophyll a retrieval;Tongming Bay

中文摘要：大范围的红树植物遥感提取容易受地物遮挡、海水浸淹以及红树植物本身覆盖程度等因素影响,为了解决这一问题,2019?04在中国广东省湛江市通明海湾红树植物生长区域进行了现场调研,并使用高分一号(Gaofen?1,GF?1)卫星遥感影像提取红树植物分布范围。首先,根据地物波谱特征,使用归一化水体指数提取水陆边线,建立红树植物适宜生长区域;然后,使用面向对象方法逐步精确红树植物生长区域,采用光谱归一化差值指数、植被指数的方法二次提取通明海湾红树植物的分布区域;最后,对两次提取结果取并集,最大化精细提取红树植物生长范围。利用经验模型对该海湾进行海水的叶绿素a反演,分析该区域红树植物周围海水叶绿素a的浓度及分布特征,对红树植物与其周围水环境叶绿素a浓度的相关性进行研究。研究结果显示,红树植物生长区域的水体叶绿素a浓度极高,且近岸水体有红树植物的区域,其叶绿素a浓度要高于无红树植物区域。相关性分析表明叶绿素a浓度与红树植物之间有较好的相关性,叶绿素a浓度由高浓度急剧降低为低浓度,证明红树植物周围水体叶绿素a浓度及分布特征有明显变化规律,可以使用该方法精细提取全部红树植物生长范围。

外文摘要：Objectives:Large?scaled remote sensing extraction of mangrove plants can be easily affected by the factors,such as ground objects,sea flooding and the degree of mangrove plants’coverage.To solve this problem,the most suitable method to extract the growth area of mangrove plants was explored.In April 2019,we conducted a field survey on the mangrove growth area located in Tongming Bay,Zhanjiang.Methods:Using remote sensing image of GF?1(Gaofen?1)satellite,the distribution range of mangrove plants was extracted.According to the spectral characteristics of ground objects,normalized difference wa?ter index was used to extract the land?and?water boundary for establishing a suitable growing area of the mangrove plants,while object?oriented method for gradually pinpointing the growth area.Besides,regional distribution of mangrove plants was secondary extracted through the methods of spectral normalized difference index and vegetation index.The union of the two extraction results was obtained to maximize the precise growth area of mangrove plants.Based on the empirical model of Chlorophyll a of mangrove plants in the water environment,the retrieval of Chlorophyll a was carried out.Results:Experimental results show that the concentration of Chlorophyll a is high in the growth area of mangrove plants,and in the nearshore water with mangrove plants,the concentration of Chlorophyll a is higher than that without mangrove plants.Fur?thermore,correlation analysis shows that there is a good correlation between Chlorophyll a and mangrove plants,and the concentration of Chlorophyll a decreases sharply from high concentration to low concentra?tion,which proves that the concentration and distribution characteristics of Chlorophyll a in the water around mangrove plants indicate a significant law of change.Conclusions:Therefore,this method can be ap?plied to accurately extract the growth range of all the mangrove plants.